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SOLVENCY

Head to head

o3-pro vs Claude Opus 4

o3-pro: legacyClaude Opus 4: retiredheavy tier

Verdict · modelled basis

Claude Opus 4 costs 1.0x less per solved task.

On output token price alone, Claude Opus 4 looks 1.1x cheaper (1.3x on input). The ranking holds, but the margin changes.

Source: Aider polyglot benchmark · verified 2026-08-21 · prices from each provider's pricing page

Input $/M tokens

lower is better

  • o3-pro$20
  • Claude Opus 4$15

Output $/M tokens

lower is better

  • o3-pro$80
  • Claude Opus 4$75

Cost per solved task

modelled basis · lower is better

  • o3-pro$19.08
  • Claude Opus 4$18.75
o3-proClaude Opus 4
Input $/Mtok$20$15
Output $/Mtok$80$75
Cached input $/Mtokmissing$1.5
Pass rate85%72%
Pass rate sourceAiderAider
Cost basismodelledmodelled
Cost per solved task$19.08$18.75

verified 2026-08-21 · heavy task tier; measured rows ignore the tier· Methodology· o3-pro· Claude Opus 4